Illinois HB 5400: PERMANENT STANDARD TIME

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104TH GENERAL ASSEMBLY 
State of Illinois 
2025 and 2026
HB5400

Introduced 2/10/2026, by Rep. Daniel Didech 

SYNOPSIS AS INTRODUCED:

5 ILCS 440/1 from Ch. 1, par. 3201

 Amends the Time Standardization Act. Exempts the State, after Iowa and Missouri are exempt, from daylight saving time under the exemption provisions of the federal Uniform Time Act of 1966 and declares the standard time in the State year-round to be United States standard central time. Makes findings.

LRB104 16305 BDA 29691 b

A BILL FOR

HB5400LRB104 16305 BDA 29691 b

1 AN ACT concerning government.

2 Be it enacted by the People of the State of Illinois, 

3represented in the General Assembly:

4 Section 5. Findings. The General Assembly hereby finds and 

5declares as follows: 

6 (a) Changing clocks seasonally is disruptive to the 

7health, safety, education, and economy of the people of the 

8State of Illinois. 

9 (b) Federal law only permits permanent standard time by 

10exemption from daylight saving time as the alternative to 

11seasonally changing clocks. 

12 (c) Permanent daylight saving time has historically been 

13repealed due to its harmful effects soon after its trials 

14during World War II and the 1970s Oil Crisis. 

15 (d) Permanent standard time has historically proven to 

16last without incident for decades. 

17 (e) The American Academy of Sleep Medicine, National Sleep 

18Foundation, Sleep Research Society, and Society for Research 

19on Biological Rhythms advise against permanent daylight saving 

20time and recommend permanent standard time. 

21 (f) Standard time is intended to approximate natural solar 

22time. 

23 (g) Coordination with contiguous states regarding 

24timekeeping is essential to convenience of commerce.

H